2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include "cipher_locl.h"
11 #include "cipher_des.h"
12 #include "internal/rand_int.h"
13 #include "internal/provider_algs.h"
14 #include "internal/providercommonerr.h"
16 /* TODO(3.0) Figure out what flags need to be here */
17 #define DES_FLAGS (EVP_CIPH_RAND_KEY)
19 static OSSL_OP_cipher_freectx_fn des_freectx;
20 static OSSL_OP_cipher_encrypt_init_fn des_einit;
21 static OSSL_OP_cipher_decrypt_init_fn des_dinit;
22 static OSSL_OP_cipher_get_ctx_params_fn des_get_ctx_params;
23 static OSSL_OP_cipher_gettable_ctx_params_fn des_gettable_ctx_params;
25 static void *des_newctx(void *provctx, size_t kbits, size_t blkbits,
26 size_t ivbits, unsigned int mode, uint64_t flags,
27 const PROV_CIPHER_HW *hw)
29 PROV_DES_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
32 cipher_generic_initkey(ctx, kbits, blkbits, ivbits, mode, flags, hw,
37 static void des_freectx(void *vctx)
39 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
41 OPENSSL_clear_free(ctx, sizeof(*ctx));
44 static int des_init(void *vctx, const unsigned char *key, size_t keylen,
45 const unsigned char *iv, size_t ivlen, int enc)
47 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
52 if (ivlen != ctx->ivlen) {
53 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IVLEN);
56 memcpy(ctx->iv, iv, ivlen);
60 if (keylen != ctx->keylen) {
61 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
64 return ctx->hw->init(ctx, key, keylen);
69 static int des_einit(void *vctx, const unsigned char *key, size_t keylen,
70 const unsigned char *iv, size_t ivlen)
72 return des_init(vctx, key, keylen, iv, ivlen, 1);
75 static int des_dinit(void *vctx, const unsigned char *key, size_t keylen,
76 const unsigned char *iv, size_t ivlen)
78 return des_init(vctx, key, keylen, iv, ivlen, 0);
81 static int des_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
84 DES_cblock *deskey = ptr;
85 size_t kl = ctx->keylen;
87 if (kl == 0 || rand_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0)
89 DES_set_odd_parity(deskey);
93 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(des)
94 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
95 CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(des)
97 static int des_get_ctx_params(void *vctx, OSSL_PARAM params[])
99 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
102 if (!cipher_generic_get_ctx_params(vctx, params))
105 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
106 if (p != NULL && !des_generatekey(ctx, p->data)) {
107 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
113 #define IMPLEMENT_des_cipher(type, lcmode, UCMODE, flags, \
114 kbits, blkbits, ivbits, block) \
115 static OSSL_OP_cipher_newctx_fn type##_##lcmode##_newctx; \
116 static void *des_##lcmode##_newctx(void *provctx) \
118 return des_newctx(provctx, kbits, blkbits, ivbits, \
119 EVP_CIPH_##UCMODE##_MODE, flags, \
120 PROV_CIPHER_HW_des_##lcmode()); \
122 static OSSL_OP_cipher_get_params_fn des_##lcmode##_get_params; \
123 static int des_##lcmode##_get_params(OSSL_PARAM params[]) \
125 return cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, flags, \
126 kbits, blkbits, ivbits); \
128 const OSSL_DISPATCH des_##lcmode##_functions[] = { \
129 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))des_einit }, \
130 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))des_dinit }, \
131 { OSSL_FUNC_CIPHER_UPDATE, \
132 (void (*)(void))cipher_generic_##block##_update }, \
133 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##block##_final },\
134 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
135 { OSSL_FUNC_CIPHER_NEWCTX, \
136 (void (*)(void))des_##lcmode##_newctx }, \
137 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))des_freectx }, \
138 { OSSL_FUNC_CIPHER_GET_PARAMS, \
139 (void (*)(void))des_##lcmode##_get_params }, \
140 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
141 (void (*)(void))cipher_generic_gettable_params }, \
142 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))des_get_ctx_params }, \
143 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
144 (void (*)(void))des_gettable_ctx_params }, \
145 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
146 (void (*)(void))cipher_generic_set_ctx_params }, \
147 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
148 (void (*)(void))cipher_generic_settable_ctx_params }, \
152 /* des_ecb_functions */
153 IMPLEMENT_des_cipher(des, ecb, ECB, DES_FLAGS, 64, 64, 0, block);
154 /* des_cbc_functions */
155 IMPLEMENT_des_cipher(des, cbc, CBC, DES_FLAGS, 64, 64, 64, block);
156 /* des_ofb64_functions */
157 IMPLEMENT_des_cipher(des, ofb64, OFB, DES_FLAGS, 64, 8, 64, stream);
158 /* des_cfb64_functions */
159 IMPLEMENT_des_cipher(des, cfb64, CFB, DES_FLAGS, 64, 8, 64, stream);
160 /* des_cfb1_functions */
161 IMPLEMENT_des_cipher(des, cfb1, CFB, DES_FLAGS, 64, 8, 64, stream);
162 /* des_cfb8_functions */
163 IMPLEMENT_des_cipher(des, cfb8, CFB, DES_FLAGS, 64, 8, 64, stream);